An improper handing of overflow in the UTF-8 decoder with supplementary characters can lead to an infinite loop in the decoder causing a…

Description

An improper handing of overflow in the UTF-8 decoder with supplementary characters can lead to an infinite loop in the decoder causing a Denial of Service. Versions Affected: Apache Tomcat 9.0.0.M9 to 9.0.7, 8.5.0 to 8.5.30, 8.0.0.RC1 to 8.0.51, and 7.0.28 to 7.0.86.

Scores

EPSS (exploitation in 30 days)

20.4% · top 2.5% of all CVEs (4 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: yes · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.

Weakness

• Denial of Service
• CWE-835 (opens in a new tab)All about CWE-835 and its CVEs

Affected products

• Apache Software Foundation · Apache Tomcat

  • affected 9.0.0.M9 to 9.0.7
  • affected 8.5.0 to 8.5.30
  • affected 8.0.0.RC1 to 8.0.51
  • affected 7.0.28 to 7.0.86

Affected packages

From reviewed advisories of the GitHub Advisory Database.

• Mavenorg.apache.tomcat.embed:tomcat-embed-coreGHSA-m59c-jpc8-m2x4 (opens in a new tab)

References (38)

• USN-3723-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• 104898 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
• RHSA-2018:2740 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:2741 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:2921 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:2742 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• DSA-4281 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
• RHSA-2018:2945 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:2939 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:2701 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• https://security.netapp.com/advisory/ntap-20180817-0001/ (opens in a new tab)x_refsource_CONFIRMx_transferred
• RHEA-2018:2188 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• [www-announce] 20180722 [SECURITY] CVE-2018-1336 Apache Tomcat - Denial of Service (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• RHEA-2018:2189 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:2743 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:2700 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• [debian-lts-announce] 20180902 [SECURITY] [DLA 1491-1] tomcat8 security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• RHSA-2018:3768 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• RHSA-2018:2930 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• 1041375 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
• [tomcat-dev] 20190319 svn commit: r1855831 [24/30] - in /tomcat/site/trunk: ./ docs/ xdocs/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [tomcat-dev] 20190319 svn commit: r1855831 [25/30] - in /tomcat/site/trunk: ./ docs/ xdocs/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [tomcat-dev] 20190325 svn commit: r1856174 [22/29] - in /tomcat/site/trunk: docs/ xdocs/ xdocs/stylesheets/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [tomcat-dev] 20190325 svn commit: r1856174 [23/29] - in /tomcat/site/trunk: docs/ xdocs/ xdocs/stylesheets/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [tomcat-dev] 20190325 svn commit: r1856174 [24/29] - in /tomcat/site/trunk: docs/ xdocs/ xdocs/stylesheets/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [tomcat-dev] 20190413 svn commit: r1857494 [17/20] - in /tomcat/site/trunk: ./ docs/ xdocs/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [tomcat-dev] 20190413 svn commit: r1857496 [3/4] - in /tomcat/site/trunk: ./ docs/ xdocs/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [tomcat-dev] 20190413 svn commit: r1857494 [16/20] - in /tomcat/site/trunk: ./ docs/ xdocs/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [tomcat-dev] 20190415 svn commit: r1857582 [18/22] - in /tomcat/site/trunk: docs/ xdocs/stylesheets/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [tomcat-dev] 20190415 svn commit: r1857582 [17/22] - in /tomcat/site/trunk: docs/ xdocs/stylesheets/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [tomcat-dev] 20190415 svn commit: r1857582 [19/22] - in /tomcat/site/trunk: docs/ xdocs/stylesheets/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• https://support.f5.com/csp/article/K73008537?utm_source=f5support&amp%3Butm_medium=RSS (opens in a new tab)x_refsource_CONFIRMx_transferred
• [tomcat-dev] 20200203 svn commit: r1873527 [24/30] - /tomcat/site/trunk/docs/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [tomcat-dev] 20200203 svn commit: r1873527 [25/30] - /tomcat/site/trunk/docs/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [tomcat-dev] 20200213 svn commit: r1873980 [27/34] - /tomcat/site/trunk/docs/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [tomcat-dev] 20200213 svn commit: r1873980 [28/34] - /tomcat/site/trunk/docs/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [tomcat-dev] 20200213 svn commit: r1873980 [29/34] - /tomcat/site/trunk/docs/ (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• https://www.oracle.com/security-alerts/cpuapr2020.html (opens in a new tab)x_refsource_MISCx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisory GHSA-m59c-jpc8-m2x4 (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2018-1336](https://trackcve.app/badge/CVE-2018-1336.svg)](https://trackcve.app/cve/CVE-2018-1336)

Record last updated 14 Nov 2024, 20:35 UTC.